How to use fstream objects with relative path?

Question

Do I always have to specify absolute path for objects instantiated from std::fstream class? In other words, is there a way to specify just relative path to them

Answer 1

On linux also:

// main.cpp
int main() {
    ifstream myFile("../Folder/readme.txt");
    // ...
}

Assuming the folder structure is something like this:

/usr/Douments/dev/MyProject/main.cpp /usr/Documents/dev/MyProject/Folder/readme.txt